<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
Morgan Stanley Dean Witter Quality Municipal Investment Trust
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 340,466,303
<INVESTMENTS-AT-VALUE> 344,916,133
<RECEIVABLES> 6,360,501
<ASSETS-OTHER> 59,245
<OTHER-ITEMS-ASSETS> 95,985
<TOTAL-ASSETS> 351,431,864
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (2,358,947)
<TOTAL-LIABILITIES> (2,358,947)
<SENIOR-EQUITY> 105,000,000
<PAID-IN-CAPITAL-COMMON> 237,681,419
<SHARES-COMMON-STOCK> 17,026,213
<SHARES-COMMON-PRIOR> 17,676,713
<ACCUMULATED-NII-CURRENT> 2,599,290
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (657,622)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 4,449,830
<NET-ASSETS> 349,072,917
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,069,584
<OTHER-INCOME> 0
<EXPENSES-NET> (917,957)
<NET-INVESTMENT-INCOME> 10,151,627
<REALIZED-GAINS-CURRENT> (164,934)
<APPREC-INCREASE-CURRENT> (1,042,269)
<NET-CHANGE-FROM-OPS> 8,944,424
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (10,080,149)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (650,500)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (9,560,485)
<ACCUMULATED-NII-PRIOR> 2,527,812
<ACCUMULATED-GAINS-PRIOR> (492,688)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (615,746)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (927,329)
<AVERAGE-NET-ASSETS> 246,854,999
<PER-SHARE-NAV-BEGIN> 14.35
<PER-SHARE-NII> 0.59
<PER-SHARE-GAIN-APPREC> (0.01)
<PER-SHARE-DIVIDEND> (0.59)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 14.34
<EXPENSE-RATIO> 0.75
</TABLE>